Measurement and Instrumentation The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is 3 mA. 1 mA. 2 mA. 4 mA. 3 mA. 1 mA. 2 mA. 4 mA. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The inductance of a certain moving iron ammeter is expressed as L = 2+5θ-θ2 µH. The control spring torque is 2 × 10-6 Nm/radian. Find the deflection in radians for a current of 2A. 1 4 2 5 1 4 2 5 ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A resistance of 105 ohms is specified using significant figures as indicated below : 1. 105 ohms 2. 105.0 ohms 3. 0.000105 mega ohms Among these, 1 represents greater precision than 2 and 3. 2 and 3 represent greater precision than 1. 1, 2 and 3 represent same precision. 2 represents greater precision but 1 and 3 represent same precision. 1 represents greater precision than 2 and 3. 2 and 3 represent greater precision than 1. 1, 2 and 3 represent same precision. 2 represents greater precision but 1 and 3 represent same precision. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The moving coil-meters, damping is provided by the coil spring attached to the moving. eddy current disk. the aluminium frame of the coil. damping vane in the airtight chamber. the coil spring attached to the moving. eddy current disk. the aluminium frame of the coil. damping vane in the airtight chamber. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken From a battery From a source which is not the same as the unknown voltage Any of the above From the same source as the unknown voltage From a battery From a source which is not the same as the unknown voltage Any of the above From the same source as the unknown voltage ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A single phase load is connected between R and Y terminals of a 415 V, symmetrical, 3-phase, 4 wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read + 795 W. - 597 W. + 597 W. - 795 W. + 795 W. - 597 W. + 597 W. - 795 W. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS